Electrical zooming and focusing six million-pixel day and night dual-purpose lens

Abstract

The invention relates to an electrical zooming and focusing six million-pixel day and night dual-purpose lens. The optical system of the lens is provided with a front lens group A with negative focal power and a rear lens group B with positive focal power sequentially along the light incident direction from left to right; a variable diaphragm C is arranged between the front group A and the rear group B; the front group A comprises a lens A-1, a lens A-2 and a lens A-3 which are arranged in sequence from left to right; the rear group B comprises a lens B-1, a lens B-2, a lens B-3, a gluing group for close connection of a lens B-4 and a lens B-5 and a gluing group for close connection of a lens B-6 and a n lens B-7 which are arranged in sequence from left to right. Through the motor accurately and electrically adjusting the lens, the view angle of a monitoring field can be conveniently selected; when the view field of the monitoring filed needs to be conveniently and accurately switched, adopting the lens is important, and the optical design is optimized; and the lens can be applied to the newest 1 / 1.8'' large-target plane CCD chip on the market, and monitoring needs of a supper large view angle can be met.

Description

technical field [0001] The invention relates to the field of camera lens devices of a monitoring system, in particular to a motorized zoom and focus 6-megapixel day and night lens. Background technique [0002] Conventional fixed-focus lenses have only a single focal length, which is very inconvenient to observe when the field of view of the surveillance site needs to be changed, while general electric zoom lenses are not cost-effective, and the accuracy of the application in this area is not enough to achieve fast zooming and accurate Focus effect. Contents of the invention [0003] The purpose of the present invention is to address the above deficiencies, to provide a motorized zoom and focus with six million pixels day and night, which can realize the function of precisely adjusting the focal length, is suitable for a 1 / 1.8" large target surface CCD chip, and has high resolution imaging capabilities. Use the lens. [0004] The technical solution of the present inventi...

AI Technical Summary

Problems solved by technology

[0002] Conventional fixed-focus lenses have only a single focal length, which is very inconvenient to observe when the field of view of the surveillance site needs to be changed, while general electric zoom lenses are not cost-effective, and the accuracy of the application in this area is not enough to achieve fast zooming and accurate The effect of focusing

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